Synthesis of Bimetallic Pd-Based/Activated Carbon Catalyst by Biomass-Reduction Method for Highly Efficient Hydrogen Storage System Based on CO<sub>2</sub>/Formate
Liangyu Zou, Qi Liu, Qiaoyu Zhang, Zhiqing Zhu, Yangqiang Huang, Zhiwu Liang
Abstract
Recently, the utilization of formic acid (FA) as promising hydrogen carriers through the interconversion between CO2 and FA has attracted increasing research interest. In this work, we showed that bimetallic Pd-based nanoparticles were synthesized by using a biomass-reduction method catalyzing CO2/bicarbonate hydrogenation as well as FA/formate dehydrogenation. Multipronged characterization techniques were applied to understand the electron-donor capability of additive metal toward active center Pd enabled electronic modification. The Cu component increases the activity of hydrogenation and dehydrogenation efficiently; the synergistic effect of metal in Pd- based bimetal catalyst system makes the two catalysts maintain high activity. Furthermore, the redox potential of metal can be adopted to explain the phenomenon that some non-noble metals are more suitable than noble metals to combine with Pd as efficient bimetallic catalysts in FA–CO2 interconversion. These findings will have considerable implications in the fields of CO2 utilization economic and H2 storage system chemistry.